TERMIUM Plus^®

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Concentrations of electrons and protons trapped by the Earth's geomagnetic field in approximately equatorial orbits, at distances from the Earth of 1-2 and 3-4 earth radii ("inner" and "outer" Van Allen belts).  1, fiche 1, Anglais, - radiation%20belts

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Van Allen belts. Two doughnut-shaped belts in the Earth's magnetosphere (inner belt some 3000 km above the surface; outer belt, 18,000-20,000 km above the surface), where many energetic charged particles from the solar wind are trapped in Earth's magnetic field.  4, fiche 1, Anglais, - radiation%20belts

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The Van Allen radiation belt is a torus of energetic charged particles around Earth, trapped by Earth's magnetic field. ... Qualitatively, it is useful to view this belt as consisting of two belts around Earth, the inner radiation belt and the outer radiation belt. The particles are distributed such that the inner belt consists mostly of protons while the outer belt consists mostly of electrons.  5, fiche 1, Anglais, - radiation%20belts

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... J.A. van Allen and his associates discovered two belts of very high density ... one centered about 3200 kilometers above the earth and the other at an approximate altitude of 16,000 kms.  1, fiche 1, Anglais, - radiation%20belts

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radiation belts; Van Allen (radiation) belts: when used in the plural, these terms refer to both belts (inner and outer Van Allen belts). When used in the singular, the Van Allen (radiation) belt sometimes refer to both belts but mostly to the "inner belt".  6, fiche 1, Anglais, - radiation%20belts

Fiche 1,  Justifications,  Français

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Concentrations d'électrons et de protons piégés par le champ géomagnétique terrestre sur des orbites approximativement équatoriales, à des distances de la Terre de 1 à 2 et de 3 à 4 rayons terrestres (ceintures de Van Allen «intérieure» et «extérieure»).  4, fiche 1, Français, - ceintures%20de%20radiation

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La Terre est entourée de deux zones dans lesquelles le rayonnement est particulièrement intense : la «ceinture intérieure», ou «ceinture de Van Allen», et la «ceinture extérieure». Ces zones sont dues à une sorte de capture des radiations cosmiques par le champ magnétique terrestre [...]  5, fiche 1, Français, - ceintures%20de%20radiation

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Lorsqu'utilisés au pluriel, les termes «ceintures de radiation» et «ceintures de Van Allen» se rapportent aux deux ceintures de Van Allen, soit la «ceinture intérieure» et la «ceinture extérieure».  6, fiche 1, Français, - ceintures%20de%20radiation

Fiche 1,  Justifications,  Espagnol

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Concentraciones de electrones y protones atrapados por el campo geomagnético terrestre en órbitas aproximadamente ecuatoriales, a distancias de la Tierra de 1-2 y 3-4 radios terrestres (cinturones "interior" y "exterior" de Van Allen).  1, fiche 1, Espagnol, - cinturones%20de%20radiaci%C3%B3n

Fiche 2,  Justifications,  Anglais

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[One of the] two concentric, toroid (or donut-shaped) regions of stably trapped charged particles [mostly protons] that exist because the geomagnetic field near the Earth is strong and field lines are closed.  1, fiche 2, Anglais, - inner%20Van%20Allen%20radiation%20belt

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The Inner Belt has a maximum proton density near 5,000 km above the Earth's surface, and contains mostly high energy protons produced by cosmic ray collisions with the Earth's upper atmosphere.  1, fiche 2, Anglais, - inner%20Van%20Allen%20radiation%20belt

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A small but very intense "inner belt" (some call it "The Van Allen Belt" because it was discovered in 1958 by James Van Allen of the University of Iowa) is trapped within 4000 miles or so of the Earth's surface. It consists mainly of high-energy protons (10-50 MeV) and is a by-product of the cosmic radiation, a thin drizzle of very fast protons and nuclei which apparently fill all our galaxy.  3, fiche 2, Anglais, - inner%20Van%20Allen%20radiation%20belt

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The term "Van Allen belt" is sometimes used to describe the "inner belt", it is rarely used to describe the "outer belt."  4, fiche 2, Anglais, - inner%20Van%20Allen%20radiation%20belt

Fiche 2,  Justifications,  Français

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La Terre est entourée de deux zones dans lesquelles le rayonnement est particulièrement intense : la «ceinture intérieure», ou «ceinture de Van Allen», et la «ceinture extérieure». Ces zones sont dues à une sorte de capture des radiations cosmiques par le champ magnétique terrestre [...]  2, fiche 2, Français, - ceinture%20de%20Van%20Allen%20int%C3%A9rieure

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On a découvert deux ceintures de radiation principales ou ceintures de Van Allen. La ceinture inférieure est composée de protons d'une énergie d'environ 10⁸eV et d'électrons d'une énergie de 20 à 500 KeV. Elle commence à 2 400 et finit à 5 600 km de la Terre et repose entre les latitudes [plus ou moins] 30°.  5, fiche 2, Français, - ceinture%20de%20Van%20Allen%20int%C3%A9rieure

Fiche 2,  Justifications,  Espagnol

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cinturónes de Van Allen: Conjunto de dos anillos que rodean el ecuador terrestre, formados por partículas de alta energía retenidas por el campo magnético terrestre.  2, fiche 2, Espagnol, - cinturon%20interior%20de%20Van%20Allen